You will not know if she eats until you try, I will say that 85 to 90 of my animals will eat while in shed, those that have an habit of not eating anymore I no longer offer.
Now when it comes to your case if you feed f/t and you animal refuse it will be wasted if you do not have another snake and if you feed live you may end up with a "pet" for another week (depending on the age of the feeder)
If you want to wait there is nothing wrong with that.